Xor combination of two Guids.

Xor.cs

public static Guid Xor(Guid a, Guid b)
{
    var ad = new DecomposedGuid(a);
    var bd = new DecomposedGuid(b);

    ad.Hi ^= bd.Hi;
    ad.Lo ^= bd.Lo;

    return ad.Value;
}

[StructLayout(LayoutKind.Explicit)]
private struct DecomposedGuid
{
    [FieldOffset(00)] public Guid Value;
    [FieldOffset(00)] public long Hi;
    [FieldOffset(08)] public long Lo;
    public DecomposedGuid(Guid value) : this() => Value = value;
}

Yeah, that's what I expected 😄👍